Bedrock Edition:Seed-Structure Mismatch
To do: Add sections to match the Java Edition Seed-Structure Mismatch page, and expand on existing information.
Every world generates structures randomly based on the seed. If the seed is the same, the structures should be the same. However, though the use of older versions and bugs, it was possible for structures not to match the world seed.
Addition of Structures
Addition of Villages
In Pocket Edition alpha v0.9.0, villages were added to the game. If a world existed before then, chunks which villages are usually supposed to generate in will not contain them.
Addition of Mineshafts
In Pocket Edition alpha v0.9.0, mineshafts were added to the game. If a world existed before then, chunks which mineshafts are usually supposed to generate in will not contain them.
Addition of Strongholds
In Pocket Edition alpha v0.9.0, strongholds were added to the game. If a world existed before then, chunks which strongholds are usually supposed to generate in will not contain them.
Addition of Dungeons
In Pocket Edition alpha v0.9.0, dungeons were added to the game. If a world existed before then, chunks which dungeons are usually supposed to generate in will not contain them.
Addition of Desert Wells
In Pocket Edition alpha v0.11.0, desert wells were added to the game. If a world existed before then, chunks which desert wells are usually supposed to generate in will not contain them.
Addition of Desert Pyramids
In Pocket Edition alpha v0.13.0, desert pyramids, or desert temples, were added to the game. If a world existed before then, chunks which desert temples are usually supposed to generate in will not contain them.
Addition of Swamp Huts
In Pocket Edition alpha v0.14.0, swamp huts, or witch huts, were added to the game. If a world existed before then, chunks which witch huts are usually supposed to generate in will not contain them.
Addition of Jungle Pyramids
In Pocket Edition alpha v0.15.0, jungle pyramids, or jungle temples, were added to the game. If a world existed before then, chunks which jungle temples are usually supposed to generate in will not contain them.
Addition of Ocean Monuments
In Pocket Edition alpha v0.16.0, ocean monuments were added to the game. If a world existed before then, chunks which ocean monuments are usually supposed to generate in will not contain them.
Addition of Igloos
In Pocket Edition alpha 0.17.0.1, igloos were added to the game. If a world existed before then, chunks which igloos are usually supposed to generate in will not contain them.
Addition of Shipwrecks
In Bedrock Edition beta 1.2.14.2, shipwrecks were added to the game. If a world existed before then, chunks which shipwrecks are usually supposed to generate in will not contain them.
Addition of Buried Treasure Chests
In Bedrock Edition beta 1.2.14.2, buried treasure chests, or buried treasure, was added to the game. If a world existed before then, chunks which buried treasure is usually supposed to generate in will not contain them.
Addition of Ocean Ruins
In Bedrock Edition beta 1.2.20.1, ocean ruins were added to the game. If a world existed before then, chunks which ocean ruins are usually supposed to generate in will not contain them.
Addition of Pillager Outposts
In Bedrock Edition beta 1.10.0.3, pillager outposts were added to the game. If a world existed before then, chunks which pillager outposts are usually supposed to generate in will not contain them.
Addition of Bastion Remnants
In Bedrock Edition beta 1.16.0.57, bastion remnants, or bastions, were added to the game. If a world existed before then, chunks which bastions are usually supposed to generate in will not contain them.
Addition of Ruined Portals
In Bedrock Edition beta 1.16.0.57, ruined portals, or ruined nether portals, were added to the game. If a world existed before then, chunks which ruined nether portals are usually supposed to generate in will not contain them.
Addition of Ancient Cities
In Bedrock Edition beta 1.18.30.33, ancient cities were added to the game. If a world existed before then, chunks which ancient cities are usually supposed to generate in will not contain them.
Addition of Trial Chambers
In Bedrock Edition beta 1.20.60.20, trial chambers were added to the game. If a world existed before then, chunks which trial chambers are usually supposed to generate in will not contain them.